Roos, R. E. (2013). Wulfstan’s Voyage. The Baltic Sea region in the early Viking Age as seen from shipboard. Edited by Anton Englert & Athena Trakadas. (Maritime Culture of the North, vol. 2). Roskilde, The Viking Ship Museum, 2007. Historisk Tidsskrift, 110(1). Hentet fra https://tidsskrift.dk/historisktidsskrift/article/view/56458